OBJECTIVETo analyze factors associated with reduced renal function post primary percutaneous coronary intervention (PCI) in acute myocardial infarction (AMI) patients with normal baseline serum creatinine level.

METHODThe clinical and angiographic data of 216 consecutive AMI patients undergoing primary PCI with normal baseline serum creatinine level (< 1.5 mg/dl) were obtained and compared between patients with (n = 32) and without (n = 184) renal function deterioration (increase in serum creatinine > or = 25% from baseline level within 72 hours of primary PCI) post PCI.

RESULTSThe incidence of renal function deterioration was 14.8% (32/216). Patients with age > 75 years (28.1% vs. 14.1%, P = 0.047), congestive heart failure (25.0% vs. 9.2%, P = 0.017), less use of low-molecular weight heparins (84.4% vs. 95.1%, P = 0.039) and beta-blockers (75.0% vs. 95.6%, P = 0.001) as well as angiotensin converting enzyme inhibitors/angiotensin receptor blockers (81.3% vs. 93.5%, P = 0.025) and statins (84.4% vs. 97.3%, P = 0.008) were risk factors for developing renal dysfunction post PCI. Renal function deterioration post PCI was also associated with increased in-hospital mortality (25.0% vs. 2.2%, P < 0.001). Multivariate analysis showed that congestive heart failure was the single independent predictor of renal function deterioration (odds ratio = 3.275, 95% confidence interval 1.275 - 8.408, P = 0.014), while renal function deterioration was the strongest independent predictor of in-hospital death (odds ratio = 10.313, 95% confidence interval 2.569 - 41.402, P = 0.001).

CONCLUSIONRenal function deterioration is a common complication post primary PCI and is associated with higher risk of in-hospital death in AMI patients with normal baseline serum creatinine level.